Open AccessOn feasibility of linear interference alignment for single‐input–single‐output multi‐frequency interference channel
Author(s) -
Du Guanglong,
Zou Weixia,
Zhou Zheng,
Liu Jianhan
Publication year - 2014
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.0017
Subject(s) - interference (communication) , interference alignment , channel (broadcasting) , computer science , diagonal , algorithm , adjacent channel interference , orthogonal frequency division multiplexing , co channel interference , noise (video) , matrix (chemical analysis) , telecommunications , mathematics , topology (electrical circuits) , mimo , combinatorics , materials science , geometry , composite material , artificial intelligence , image (mathematics)
This study explores the feasibility of linear interference alignment (IA) for a ( M × M , 1) K system with multi‐frequency independent channels. The authors prove that number of users K ≤ 2 M − 2 is a necessary condition for ( M × M , 1) K multi‐frequency IA system, which is less than that of ( M × M , 1) K multiple‐input–multiple‐output system (i.e. K ≤ 2 M − 1). The conclusion can be extended to all cases with the diagonal channel matrix. They also reveal that the traditional frequency division multiplexing method is inefficient in spectrum utilisation. They apply max‐SINR (signal to interference plus noise ratio) and iterative IA algorithms and the author's simulation results verify that IA algorithms work well in ( M × M , 1) 2 M –2 IA system.